Ключевые слова: abstract, alternative, background, cartoon, clean, concept, conservation, design, earth, eco, ecology, electric, electric car, electricity, energy, environment, environmental, flat, generation, generator, green, icon, icons, illustration, industrial, industry, innovation, leaf, mill, nature, plant, power, propeller, recycle, renewable, resource, reuse, simple, solar, station, sun, sustainable, symbol, technology, turbine, waste, wind, wind turbine, windmill,